Malicious PDF — malware analysis report

Static analysis result for SHA-256 43562146516842e3…

MALICIOUS

PDF

40.5 KB Created: 2020-04-04 11:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f5e6b3f5a61a6f5c907562b90c4c9746 SHA-1: 3d156ee2f0e553faf18d6ee247bfc30e2067768e SHA-256: 43562146516842e31bad09455e41f4271403e5bdd3e6796716549330339d9132
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that is also listed among the extracted URLs. This suggests the primary purpose is to redirect users to a network of websites, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://saranlpcoach.com/uploads/1/3/1/3/131381693/131381693.html#strength+and+conditioning+certification+issa
    • http://simply-inspired-teaching.com/uploads/1/3/0/5/130551677/1380811.pdf
    • http://pirtekkzn.com/uploads/1/3/0/5/130588727/4924a.pdf
    • http://russellviolin.com/uploads/1/3/1/4/131482995/8354428.pdf
    • http://munding-pr.com/uploads/1/3/1/3/131380146/d7a4f9f68c3b4.pdf
    • http://diasporacreation.com/uploads/1/3/0/6/130620987/bunok.pdf
    • http://se-music.com/uploads/1/3/1/4/131438563/5750289.pdf
    • http://vonshentonproject.com/uploads/1/3/0/5/130588824/043d4.pdf
    • http://lockheartproject.com/uploads/1/3/0/5/130588865/38fc8625c033a20.pdf
    • http://jamesnalexa.com/uploads/1/3/1/4/131407588/6906559.pdf
    • http://mickeymousecars.net/uploads/1/3/0/6/130604378/6254a6edd0738e.pdf
    • http://greggstclair.com/uploads/1/3/1/4/131453805/jazidobivo.pdf
    • http://devionhagenphotography.com/uploads/1/3/0/2/130270966/piwuxepemegogeximedi.pdf
    • http://kayla2016.com/uploads/1/3/0/7/130775759/pabur-ziruxig-lojekiworefaber-valewazis.pdf
    • http://applesandgears.org/uploads/1/3/0/7/130775916/1932a1e837e939c.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007526.bin
4b66641849c562ff753620cdd739b94ea7d0e54ac1a252e0939ea52fe074f98c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7526 7780 bytes

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